package chapter06.Example;

import java.io.IOException;
import java.util.Random;

public class Example10 {
    public static void main(String[] args) throws IOException {
        //system类
        long time = System.currentTimeMillis();
        System.out.println("time = "+ time);
        //Runtime类
        Runtime rt = Runtime.getRuntime();
//        while (true){
//            rt.exec("mspaint.exe");
//        }
        //Math类
        System.out.println(Math.random());
        System.out.println(Math.PI);
        //Random类
        Random random = new Random();
        for (int i = 0; i < 10; i++){
            System.out.println(random.nextInt(56));
        }
    }
}